O'Fallon, MO: how dark is the sky here?

O'Fallon's sky measures suburban edge here. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Only 22.2% of the 3,206 cities measured here read darker than O'Fallon.

This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.

Where to go for a darker sky near O'Fallon

Maryland Heights, MO, about 14 miles away as the crow flies, measures in the rural band, one step darker than O'Fallon. Actual driving distance will run longer than that straight-line figure.

Maryland Heights, MO is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

How O'Fallon compares nationally

O'Fallon, MO has a population of about 95,355, one of 3,206 US cities of 10,000 or more residents in this dataset. O'Fallon places 707 of 3,206 cities in this dataset's darkest-to-brightest order.